If it takes one hour to fill a pool with 50 ft3 of water, how many hours will it take to fill a pool that measures 10 ft by 8 ft with a depth of 5 ft?

Quadrilateral efgh was dilated with the origin as the center of dilation to create quadrilateral e'f'g'h'. the quadrilateral was dilated using a scale factor of 2.5. the lengths of the sides of quadrilateral efgh are given. what is the length of side f'g'?